$ git clone -n https://src.fedoraproject.org/rpms/ocaml-cppo.git /var/lib/mock/f42-build-865505-173241/root/chroot_tmpdir/scmroot/ocaml-cppo
Cloning into '/var/lib/mock/f42-build-865505-173241/root/chroot_tmpdir/scmroot/ocaml-cppo'...
$ git fetch origin dfa67c4858db853a7256ee92b8426a2a3c51a4b5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-cppo
 * [new ref]         dfa67c4858db853a7256ee92b8426a2a3c51a4b5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dfa67c4 OCaml 5.3.0 rebuild for Fedora 42